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authorLinus Torvalds <torvalds@linux-foundation.org>2011-04-20 17:40:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-04-20 17:40:25 -0700
commit8653b3f1d5bf2c7b09962a5747c74280758444ee (patch)
treebef0cf99c341f8d9212d069c18f9f7961f34bac9
parentd09571059b89cf1a079afe88ecb64386f591b061 (diff)
parentee176455e28469e2420032aab3db11ac2ae3eaa8 (diff)
Merge branch 'stable/bug-fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/bug-fixes-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen: xen: mask_rw_pte: do not apply the early_ioremap checks on x86_32 xen: do not create the extra e820 region at an addr lower than 4G
-rw-r--r--arch/x86/xen/mmu.c13
-rw-r--r--arch/x86/xen/setup.c2
2 files changed, 10 insertions, 5 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index a991b57f91fe..aef7af92b28b 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1473,16 +1473,20 @@ static void xen_pgd_free(struct mm_struct *mm, pgd_t *pgd)
#endif
}
+#ifdef CONFIG_X86_32
static __init pte_t mask_rw_pte(pte_t *ptep, pte_t pte)
{
- unsigned long pfn = pte_pfn(pte);
-
-#ifdef CONFIG_X86_32
/* If there's an existing pte, then don't allow _PAGE_RW to be set */
if (pte_val_ma(*ptep) & _PAGE_PRESENT)
pte = __pte_ma(((pte_val_ma(*ptep) & _PAGE_RW) | ~_PAGE_RW) &
pte_val_ma(pte));
-#endif
+
+ return pte;
+}
+#else /* CONFIG_X86_64 */
+static __init pte_t mask_rw_pte(pte_t *ptep, pte_t pte)
+{
+ unsigned long pfn = pte_pfn(pte);
/*
* If the new pfn is within the range of the newly allocated
@@ -1497,6 +1501,7 @@ static __init pte_t mask_rw_pte(pte_t *ptep, pte_t pte)
return pte;
}
+#endif /* CONFIG_X86_64 */
/* Init-time set_pte while constructing initial pagetables, which
doesn't allow RO pagetable pages to be remapped RW */
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index fa0269a99377..90bac0aac3a5 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -227,7 +227,7 @@ char * __init xen_memory_setup(void)
memcpy(map_raw, map, sizeof(map));
e820.nr_map = 0;
- xen_extra_mem_start = mem_end;
+ xen_extra_mem_start = max((1ULL << 32), mem_end);
for (i = 0; i < memmap.nr_entries; i++) {
unsigned long long end;